Engine Break-In  
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All Forums >> RC Airplanes >> Beginners >> Engine Break-In
Page: [1]

[Poll]

Engine Break-In
Just fly it in the model and run it rich for awhile.
  18% (10)
Strap down the model to run it and break it in.
  38% (21)
Use a stand to mount it and break it in.
  34% (19)
Don't break mine in at all!
  1% (1)
Other...
  7% (4)


Total Votes : 55
(last vote on : 3/10/2007 6:32:05 AM)
(Poll will run till: -- )
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Engine Break-In - 7/15/2004 4:32:22 AM   
-pkh-



Posts: 2530
Joined: 5/28/2004
From: Emmaus, PA, USA
Status: offline 		How do you guys break in your new airplane engines?

< Message edited by -pkh- -- 7/14/2004 11:32:49 PM >
       Post #: 1

RE: Engine Break-In - 7/15/2004 5:12:42 AM   
Trombe


 

Posts: 782
Joined: 10/27/2002
From: Dallas, TX, USA
Status: offline 		run it rich on a stand so i can do tests and stuff SAFELY

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(in reply to -pkh-)
       Post #: 2

RE: Engine Break-In - 7/15/2004 6:28:50 AM   
jcflysrc



Posts: 1118
Joined: 11/9/2002
From: Houston, TX, USA
Status: offline 		I use a combination of the two. I run it in on a stand for a few tanks to find out if the engine has any air leaks or other problems. Once it will idle somewhat reliably and transition well, then I put it in the plane and fly it. Lots of loops...

Now it DOES matter what kind of engine you are breaking in, as far as how you would run it on the stand. You will not break in an ABC engine the same as one with a ring for example.

Jim

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It's all fun & games...till sombody gets hurt!

(in reply to Trombe)
       Post #: 3

RE: Engine Break-In - 7/15/2004 5:52:31 PM   
bryris



Posts: 512
Joined: 4/30/2004
From: Lakeland, FL, USA
Status: offline 		I just bought an OS .46 AX (Wanted the discontinued FX, but decided its OK to get the AX). I don't know anything about breaking in engines. Will the engine come with break-in instructions? Can I break it in while its strapped to the plane, just anchoring the plane down? Or do I need a seaprate engine mount to run it on the bench?

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In any kind of flight, really, we are among the luckiest people on earth. Though there are sacrifices in time and expense, w

(in reply to -pkh-)
       Post #: 4

RE: Engine Break-In - 7/15/2004 5:54:28 PM   
Jim Thomerson



Posts: 2858
Joined: 10/9/2002
From: Austin, TX, USA
Status: offline 		There are engines and there are engines. Iron piston, ring, ABC, revlite, etc. Each requires its own fairly specific breakin routine. The question as asked is too general.

Jim

(in reply to jcflysrc)
       Post #: 5

RE: Engine Break-In - 7/15/2004 5:58:38 PM   
Montague



Posts: 4655
Joined: 4/19/2002
From: Laurel, MD,
Status: offline 		Jim is right about all the different types of engines.

However, you can always mount it to the plane and break it in there. You won't want to fly it, just use the plane as if it were a test stand. Obviously, anchor the plane down well, and make sure you aren't going to suck anything in to the engine or have anything go in to the prop. Doing it in the middle of the pit area of your local flying field is a good way to annoy people as well. If you do it at the flying field, do it off to the side. (or in accordance with any local customs or rules, obviously)


_____________________________

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RCCA 560

(in reply to Jim Thomerson)
       Post #: 6

RE: Engine Break-In - 7/15/2004 6:10:49 PM   
-pkh-



Posts: 2530
Joined: 5/28/2004
From: Emmaus, PA, USA
Status: offline
quote:

ORIGINAL: Jim Thomerson

There are engines and there are engines. Iron piston, ring, ABC, revlite, etc. Each requires its own fairly specific breakin routine. The question as asked is too general.

Jim

More specifically, how would you break in an OS .50 SX Ringed engine with the stock muffler...
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXALM2&P=ML

(in reply to Jim Thomerson)
       Post #: 7

RE: Engine Break-In - 7/15/2004 6:57:16 PM   
bryris



Posts: 512
Joined: 4/30/2004
From: Lakeland, FL, USA
Status: offline 		I won't be breaking in my engine for another month or so, I bought it a bit early. When the time comes, I'll research it and get it done. As far as the .50SX is likely very similar to the .46AX as far as break in procedure is concerned. That was my 2nd choice for an engine, but I decided I would get that one next time.

Thanks.

< Message edited by bryris -- 7/15/2004 2:04:23 PM >

_____________________________

In any kind of flight, really, we are among the luckiest people on earth. Though there are sacrifices in time and expense, w

(in reply to -pkh-)
       Post #: 8

RE: Engine Break-In - 7/15/2004 7:08:09 PM   
-pkh-



Posts: 2530
Joined: 5/28/2004
From: Emmaus, PA, USA
Status: offline
quote:

ORIGINAL: bryris
...As far as the .50SX is likely very similar to the .46AX as far as break in procedure is concerned...

They are not similar, the .50SX is a ringed engine, the .46AX is not...

(in reply to bryris)
       Post #: 9

RE: Engine Break-In - 7/15/2004 7:46:12 PM   
LuckyArmpit



Posts: 847
Joined: 8/6/2002
From: West Middlesex, PA, USA
Status: offline 		I just got a new OS .46 AX engine and have broken it in or run it in. I followed the directions in the user manual.
I have about 4 full tanks of fuel run thru mine so far. I'm at the point where if I give full throttle, pick it up like its flying verticle,
the engine don't bog out. Doesn't even sound like this affects the motor at all. Heck, I don't even need the torque starter for it.
I just connect glo driver and hand turn the spinner. She fires right on up! Of course I'm gonna have one of the club guys check it
out before it actually flies...

Dave...

(in reply to -pkh-)
       Post #: 10

RE: Engine Break-In - 7/15/2004 9:13:50 PM   
bryris



Posts: 512
Joined: 4/30/2004
From: Lakeland, FL, USA
Status: offline 		-pkh-

I stand corrected.

_____________________________

In any kind of flight, really, we are among the luckiest people on earth. Though there are sacrifices in time and expense, w

(in reply to LuckyArmpit)
       Post #: 11

RE: Engine Break-In - 7/15/2004 9:37:26 PM   
sportair



Posts: 29
Joined: 12/6/2003
From: Tyngsboro, MA, USA
Status: offline 		I own 3 OS AX engines and all I did was run 2 tanks thru them in the airplane on the ground as the instructions indicate... then flew a bit rich for 6 flights and was gold..This engine is great..never dies on me..runs strong..


quote:

ORIGINAL: bryris

I just bought an OS .46 AX (Wanted the discontinued FX, but decided its OK to get the AX). I don't know anything about breaking in engines. Will the engine come with break-in instructions? Can I break it in while its strapped to the plane, just anchoring the plane down? Or do I need a seaprate engine mount to run it on the bench?

(in reply to bryris)
       Post #: 12

RE: Engine Break-In - 7/15/2004 10:49:41 PM   
Lancair-RCU


 

Posts: 301
Joined: 12/27/2002
From: Ballina, AUSTRALIA
Status: offline 		PKH,
I broke in my OS50SX with two tanks on the ground, alternating between very rich and just breaking in to two stroking as per the instructions supplied, then flew it for about 8 tanks running rich before leaning it out to peak and then rich a few clicks. About 20 tanks later I started having problems with it, it wouldnt rev hard, woudltn hold peak in flight after about 5 min flying and the oil from exhaust was always very dark during those tanks. I then went to a smaller prop and ran it quite rich for another 15 or so tanks and its come good, back the original 11x6 prop and it pulls around 12000rpm on the ground. I would suggest running it about 1/2 to a full turn rich for at least 20 tanks BEFORE trying to get absolute peak RPM from it in flight. It appears to me and others at my club that it likes a richer mix for quite a while to seat the ring in really well then it will hold peak power for the duration of flight.
Everyone has different ideas but thats how Id do it if I had another to break in.


_____________________________

Lancair
------------------------------------------

(in reply to sportair)
       Post #: 13

RE: Engine Break-In - 7/15/2004 11:04:45 PM   
-pkh-



Posts: 2530
Joined: 5/28/2004
From: Emmaus, PA, USA
Status: offline
quote:

ORIGINAL: Lancair-RCU
...back the original 11x6 prop...

Thanks for the OS .50 SX break-in info. You say you're running an 11X6... I thought you were supposed to run an 11X7 or 10X8 with that engine...

(in reply to Lancair-RCU)